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My thermostat does not show any display

Last night my wife turned on the ac on for the first time since last October. While trying to program the stat the display went out so I went out and bought a new one thinking it was the stat. but when i hooked the new one up the ac never turned on. I took the old one upstairs and hooked it up. It works so now i dont know whats going on can anyone help?

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Make sure you have 24VAC

Posted on Apr 23, 2009

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The display on my Ampam by Honeywell programmable thermostat displays all 8s. Is it time to get a new thermostat?


"Funky" displays often indicate a problem with a control or processor. The simplest fix is removing power for a minute or two and trying again.

Doing this will likely erase any time / temperature program in the t-stat, so you should make note of it before attempting.

I'm not familiar with the t-stat you have, but if it is like most - it has a battery or two inside to maintain the program during power outages (and allows programming while in your easy chair). You should remove the battery(s) and remove it from the wall (most will simply pull away when unclipped / disconnected) to completely power down. Wait a moment and reinstall the battery(s) and reinstall to base on the wall.

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probably tripped a limit switch or a low voltage fuse would kill your display on the tstat, you should have battery power on your stat though.unless you have knowlege of electrical you better call a technician

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Hello, first you must verify if you are getting 24 volts to the tstat at the secondary side of the transformer, if not you have a bad transformer. If you are getting 24 volts then check the batteries in the thermostat.

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Go to Advance Functions Page 23 of your manual.
You have to turn Option 0160 to "on" or "4"

1) Press System
2)Press and Hold blank center key until the display changes.
3) Change settings as required (Cursor to option 0160, then hit other cursor to change from 0 to 4)
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If the unit continues to run after disconnecting the t-stat wires, then you'll have to look in the unit for a stuck relay

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Daylight savings time adjustment


Go to:
http://www.emersonelectronics.ca/emerson/en/product/details/VLJT600
or
http://www.emersonelectronics.ca/emerson/en/category/list/694

The solution appears to be common for all recent Emerson SmartSet(tm) radios (BTW it's not the clock fault, it's the law).

Remarkably Emerson foresaw this, so here we go.

Short version (may require three hands :-) )

DST start:
Press and hold MONTH/DATE and ALARM 1 buttons for at least 3 seconds until the display changes to something like "4 F" (Fourth month, First week) alternating with something like "4. 1" (April 1st, for 2007) or "4. 6" (April 6th, for 2008). While holding down the MONTH/DATE and ALARM 1 buttons, now press the DOWN or "-" Set button (3 times) until "3F2" shows (Third month, second week) alternating with something like "3.11) (March 11th, for 2007) or "3. 9" (March 9th, for 2008). Let go of all buttons and we are now half done.

DST end:
Press and hold MONTH/DATE and ALARM 2 buttons for at least 3 seconds until the display changes to something like "10 L" (Tenth month, Last week) alternating with something like "10.28" (October 28th, for 2007) or "10.26" (October 26th, for 2008). While holding down the MONTH/DATE and ALARM 2 buttons, now press the UP or "+" Set button (1 time) until "11 F" shows (Eleventh month, first week) alternating with something like "11. 4" (November 4th, for 2007) or "11. 2" (November 2nd, for 2008). Let go of all buttons and we are now done.


This should remain until either the lithium battery fails or Congress undoes its work.


BTW the Emerson addendum has a history error. The time change in the first Sunday in April and the last Sunday in October did not start in 1966, but in 1987. Before that starting in 1966 the standard was set at the last Sunday in April and the last Sunday in October. Except for 1974, when it was January 6th, 1974 (DST start) and October 27th, 1974 (DST end) and in 1975 when it was February 23rd, 1975 (DST start) and October 26th, 1975 (DST end). Before 1966, state and local governments had many different rules. Source: http://webexhibits.org/daylightsaving/e.html

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